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Articles 1 - 30 of 153
Full-Text Articles in Dentistry
The Accuracy Of Occlusal Splint Fabricated By The Different Materials With Different 3d Printers., Supisara Thamrongsak
The Accuracy Of Occlusal Splint Fabricated By The Different Materials With Different 3d Printers., Supisara Thamrongsak
Master's Theses (2009 -)
Aim: The purpose of this study is to evaluate the accuracy of occlusal splints fabricated by the different materials with different 3D printers in four different orientations (0°, 15°, 25°, 40°) using surface matching software. Materials and Methods: Occlusal splints were printed in 4 different orientations including 0°, 15°, 25°, and 40° based on the STL file of the designed occlusal splint with 3 different printers (Carbon® M3Max, SprintRay Pro S, Asiga Pro4K). A total of 120 occlusal splints were printed for the present study, 10 occlusal splints were printed for each group. Then all occlusal splints were scanned using …
Patient Perception Of Pain Following Extraction And Bone Graft With Or Without Preemptive Ibuprofen: A Randomized Clinical Trial, Samah Rady
Master's Theses (2009 -)
Objective: The purpose of this randomized clinical trial is to investigate the effects of preemptive analgesia on postoperative pain following extraction and ridge preservation and to evaluate the association between dental care-related fear and anxiety, health literacy, fear of pain, and pain catastrophizing with post-operative pain and swelling perception as well as Oral Health Impact Profile-14 (OHIP-14). Materials and Methods: Ibuprofen 600mg (test; n=9) or placebo (n=13) were randomly given one hour prior to extraction and ridge preservation. Preoperatively, patients completed the following questionnaires: Modified Dental Anxiety Scale (MDAS), Oral health-related quality of life (OHIP-14), Fear of Pain (FPQ-III), Pain …
The Influence Of The Timing Of Definitive Restoration Placement After Root Canal Completion: A 22-Year Retrospective Study, Shikha Gupta
The Influence Of The Timing Of Definitive Restoration Placement After Root Canal Completion: A 22-Year Retrospective Study, Shikha Gupta
Master's Theses (2009 -)
Objective: To evaluate how the time interval between root canal obturation and the placement of a definitive restoration impacts the incidence of tooth failure, defined as non-surgical retreatment, apical surgery, or extraction. Methods: This 22-year-retrospective cohort study utilized electronic health records from the Marquette University School of Dentistry (MUSoD) axiUm database, analyzing 11,002 teeth treated between 2004 and 2026. Inclusion criteria required patients to be at least 18 years of age, categorized as established patients of record, with all non-surgical root canal treatments (NSRCT) meeting the 2020 AAE quality standards. The interval between obturation and restoration was categorized into seven …
Occupational Therapy And Periodontics Collaboration To Improve Hand Health And Fine Motor Skills In Dental Student, Zainab Alsuwaiyan
Occupational Therapy And Periodontics Collaboration To Improve Hand Health And Fine Motor Skills In Dental Student, Zainab Alsuwaiyan
Master's Theses (2009 -)
Background: A study conducted in 2023 by the Occupational Therapy (OT) Department and Marquette University school of dentistry (MUsoD) demonstrated that many student participants scored below average on hand function testing, indicating a need for occupational therapy intervention. Objective: The purpose of this study was to evaluate the effectiveness of occupational therapy–led training for periodontics and registered dental hygienist faculty on the performance of dental students in the Introduction to Clinical Practice course (DEIN 7114). Methods: Faculty teaching in DEIN 7114 were recruited for this study. They participated in educational sessions led by occupational therapy faculty focusing on musculoskeletal disorders …
Genotoxicity Assessment Of Conventional And Cad/Cam Denture Base Materials, Alanood Aldubayan
Genotoxicity Assessment Of Conventional And Cad/Cam Denture Base Materials, Alanood Aldubayan
Master's Theses (2009 -)
Aim: In prosthodontics, polymethyl methacrylate (PMMA) has been widely used. Their biocompatibility and potential genotoxicity remain a concern due to the residual monomer release. Computer-aided design and manufacturing (CAD/CAM) denture base materials have emerged and offered some improved mechanical and physical properties compared to the standard conventional heat-cured denture base material. However, their long-term biocompatibility remains unstudied. Therefore, this study evaluates the genotoxicity effects of conventional and CAD/CAM denture base materials on human gingival fibroblasts (HGFs). Methodology: Disk-shaped samples were fabricated of six denture base resins, including heat-cured PMMA, milled PMMA, and four 3D-printed resins. HGFs were exposed to the …
Comparing The Mechanical Properties Of Conventional, Milled, And 3d-Printed Occlusal Splint Materials: An In Vitro Study, Sadeem Alzaghran
Comparing The Mechanical Properties Of Conventional, Milled, And 3d-Printed Occlusal Splint Materials: An In Vitro Study, Sadeem Alzaghran
Master's Theses (2009 -)
Aim: Evidence on the mechanical properties of digitally manufactured occlusal splint materials remains scarce. The aim of this study was to evaluate and compare the mechanical properties of CAD/CAM fabricated occlusal splint materials versus conventionally heat-cured acrylic resin materials. Materials and Methods: A total of 100 specimens were manufactured for the present study. One CAD-CAM milled (ProArt CAD Splint), one heat-polymerized (SR IVOcap Clear), and three 3D-Printed (KeySplint Hard, NightGuard Firm2 and RoDIN Splint 2.0) resin materials were evaluated. Flexural strength, flexural modulus and surface hardness were measured. The three-point flexure test was used for the determination of flexural strength …
Comparison Of Leveling A Deep Curve Of Spee With Extractions Versus Non-Extraction: A Biomechanical Perspective, Mitchell James Muller
Comparison Of Leveling A Deep Curve Of Spee With Extractions Versus Non-Extraction: A Biomechanical Perspective, Mitchell James Muller
Master's Theses (2009 -)
Introduction: This study evaluated and compared orthodontic forces from different archwire designs and materials used to correct a deep curve of Spee. Methods: A three-dimensional orthodontic force tester (OFT) was used to measure forces and moments exerted by archwires on brackets from central incisors to first molars. Two setups were tested: one with a full dentition from central incisor to first molar, and another simulating bicuspid extractions with the first premolar removed. Dentoform models representing a deep curve of Spee were created using cone-beam computed tomography (CBCT) data. The setup employed 0.022 × 0.028-inch zero-prescription brackets secured with elastomeric ligatures. …
Low-Magnitude High-Frequency Mechanical Vibration Enhances Osteogenesis In Human Pdl Cells Through Piezo1 Ion Channel, Mina Oh
Master's Theses (2009 -)
ABSTRACT LOW-MAGNITUDE HIGH-FREQUENCY MECHANICAL VIBRATION ENHANCES OSTEOGENESIS IN HUMAN PDL CELLS THROUGH PIEZO1 ION CHANNEL Mina Oh, D.M.D Marquette University, 2025 Introduction: Low-magnitude high-frequency (LMHF) mechanical vibration has been shown to enhance osteogenesis in various osteogenic tissues and cells, including periodontal ligament (PDL) cells, however its effectiveness remains relatively low. The Piezo1 mechanosensitive ion channel plays a critical role in mechanotransduction, however its specific involvement in the LMHF-induced osteogenesis is unknown. This study aims to elucidate the role of Piezo1 in mediating osteogenic responses in human PDL cells subjected to LMHF mechanical vibration. Materials and Methods: Human PDL cells were …
Electrochemical Properties Of Rhodium-Plated Esthetic Orthodontic Archwires, Michael Hoy
Electrochemical Properties Of Rhodium-Plated Esthetic Orthodontic Archwires, Michael Hoy
Master's Theses (2009 -)
Objective: Esthetics are becoming more important to patients with increased desire for ceramic brackets as they go through orthodontic treatment. Despite ceramic brackets offering an esthetic option for patients, traditional metal wires are still most commonly being used. Very little research on rhodium plated wires, specifically the American Orthodontics Iconix Aesthetic Arch Wire, exists in the literature with no tests of corrosion through electrochemical testing. The objective of this research is to analyze how rhodium plating affects the electrochemical properties of nickel-titanium (NiTi) orthodontic wires. Methods: Rhodium-plated NiTi orthodontic wires (Iconix Aesthetic; American Orthodontics) and non-plated NiTi orthodontic wires (NT3 …
Comparison Of Shear Bond Strength Of New And Rebonded Symetri™ Clear Ceramic Brackets, Ciara Schwarz
Comparison Of Shear Bond Strength Of New And Rebonded Symetri™ Clear Ceramic Brackets, Ciara Schwarz
Master's Theses (2009 -)
Objective: The purpose of this study was to compare the shear bond strength of the Symetri™ Clear brackets bonded initially to enamel versus after rebonding. An additional aim was to see how a generic debond pliers compares to the Symetri™ Debonding pliers in terms of shear bond strength and bracket morphology after debond. Methods: Sixty extracted premolars and nine extracted canines were collected and stored in 1% Chloramine T solution. The canines were used for a pilot study to test methodology. The premolars were randomly assigned to one of three Groups: Group 1 (single bond), Group 2A (debond with Symetri™ …
Comparison Of Hand-Wrist And Cvms Methods For Craniofacial Growth Spurt Assessment, Ardita Ajvazi
Comparison Of Hand-Wrist And Cvms Methods For Craniofacial Growth Spurt Assessment, Ardita Ajvazi
Master's Theses (2009 -)
Objective: Hand-wrist (HW) radiographs are considered the most accurate method for assessing pubertal growth spurts in orthodontics but have declined in use due to added radiation exposure and the expertise required. Cervical vertebral maturation staging (CVMS) is now commonly used, given the routine availability of lateral cephalograms. However, the validity of CVMS remains uncertain. A recent study reported only 66% inter-observer reliability across time periods (Ingersoll, 2024). This follow-up study aims to evaluate CVMS as a predictor of growth to guide clinical decision-making. Methods: With protocol approval (MU HR-4695), this retrospective study followed a design modeled after a prior study …
Exploring The Potential Of No-Code Artificial Intelligence In Identifying Periapical Radiolucent Lesions, Marguerite Miller
Exploring The Potential Of No-Code Artificial Intelligence In Identifying Periapical Radiolucent Lesions, Marguerite Miller
Master's Theses (2009 -)
ABSTRACT EXPLORING THE POTENTIAL OF NO-CODE ARTIFICIAL INTELLIGENCE IN IDENTIFYING PERIAPICAL RADIOLUCENT LESIONS Marguerite Miller, D.M.D. Marquette University, 2025 Title: Exploring the Potential of No-Code Artificial Intelligence in Identifying Periapical Radiolucent Lesions. Objective: To employ a no-code platform for the development of an AI model designed to identify periapical radiolucent lesions using periapical radiographs. Methods: Three hundred twelve periapical radiographs were retrospectively collected, along with corroborating cone-beam computed tomography (CBCT) volumes and radiology reports obtained within six months. Radiology reports from board-certified oral and maxillofacial radiologists, were used as the reference standard for labeling the periapical radiographs. Among these, 180 …
Long-Term Bone Changes At Edentulous Sites, Teerarat Neal Phuatrakoon
Long-Term Bone Changes At Edentulous Sites, Teerarat Neal Phuatrakoon
Master's Theses (2009 -)
BACKGROUND: Tooth loss is a debilitating occurrence that may affect the patient’s emotional and mental well-being. Delays in necessary restorative treatment may occur dependent on the patient’s finances or other elaborate dental treatment plans. Prosthetically guided implants have become the standard of care regarding definitive treatment, however there is a lack of evidence discussing the stability of edentulous sites if deferment of treatment is required. OBJECTIVE: The aim of this study is to measure long-term changes of the edentulous alveolar ridge (height and width) and anatomical structures (e.g. sinus floor, inferior alveolar canal). METHODS: Charts of patients with at least …
Comparison Of Hand-Wrist And Cvms Methods For Craniofacial Growth Spurt Assessment, Ardita Ajvazi
Comparison Of Hand-Wrist And Cvms Methods For Craniofacial Growth Spurt Assessment, Ardita Ajvazi
Master's Theses (2009 -)
Objective: Hand-wrist (HW) radiographs are considered the most accurate method for assessing pubertal growth spurts in orthodontics but have declined in use due to added radiation exposure and the expertise required. Cervical vertebral maturation staging (CVMS) is now commonly used, given the routine availability of lateral cephalograms. However, the validity of CVMS remains uncertain. A recent study reported only 66% inter-observer reliability across time periods (Ingersoll, 2024). This follow-up study aims to evaluate CVMS as a predictor of growth to guide clinical decision-making. Methods: With protocol approval (MU HR-4695), this retrospective study followed a design modeled after a prior study …
Contribution Of Dentoalveolar Heights On Facial Heights In Class I And Class Ii Untreated Subjects, Mira Bharat Suvagia
Contribution Of Dentoalveolar Heights On Facial Heights In Class I And Class Ii Untreated Subjects, Mira Bharat Suvagia
Master's Theses (2009 -)
Objective: This research aims to investigate the impact of dentoalveolar heights on craniofacial growth and the development of Class I and Class II malocclusions in untreated subjects aged 6-18 years. The study seeks to establish relationships between dentoalveolar heights and anterior and posterior facial heights. The findings contribute to understanding the dynamic interplay between dentoalveolar growth, mandibular rotation, and facial height establishment, shedding light on critical aspects of craniofacial development. Materials and Methods: The study draws upon cephalograms from the University of Michigan Growth Study, encompassing untreated Class I and Class II subjects aged 6-18 years. A subsample of 408 …
Orthodontic Load Quantification Leveling A Deep Curve Of Spee With Different Archwire Designs, Ahmed Youssef
Orthodontic Load Quantification Leveling A Deep Curve Of Spee With Different Archwire Designs, Ahmed Youssef
Master's Theses (2009 -)
Objective: This study aimed to quantify the effects of different materials, sizes of the continuous archwires in leveling the exaggerated curve of Spee. We used an orthodontic force tester apparatus to measure the forces and moments delivered by the archwires to the brackets attached to the sensors of one quadrant of the arch (from 1st incisor to 2nd molar). The hypothesis is that there is no difference in the load and moments between the incisors when the curve of Spee is leveled with the three different mechanical designs being tested. Methods: An orthodontic force tester (OFT) was used to measure …
Impact Of Learning-Style-Based Education On Student Performance And Perception In Preclinical Endodontics: Part Ii, Rebecca Flaugher
Impact Of Learning-Style-Based Education On Student Performance And Perception In Preclinical Endodontics: Part Ii, Rebecca Flaugher
Master's Theses (2009 -)
Objectives: This study aimed to investigate if providing supplemental learning materials aligned to students’ learning modes is equally beneficial among all modes both subjectively and objectively. Methods: IRB approval was obtained (Approval #HR-3746). Second-year dental students (n=92) enrolled in Preclinical Endodontics took Kolb Experiential Learning Profile (KELP) questionnaire to determine their learning mode: Abstract Conceptualization (AC), Active Experimentation (AE), Reflective Observation (RO), or Concrete Experience (CE). Students were assigned into groups corresponding to their learning mode. Students performed non-surgical root canal treatment (NSRCT) on a #9 typodont tooth and were graded to determine baseline performance (Project 1). Students were then …
Performance And Preference Of Rotary Files By Pre-Doctoral Dental Students At Marquette School Of Dentistry, Morgan Elizabeth Mccall
Performance And Preference Of Rotary Files By Pre-Doctoral Dental Students At Marquette School Of Dentistry, Morgan Elizabeth Mccall
Master's Theses (2009 -)
Introduction: The aim of this study was twofold: 1) objectively evaluate root canal shaping and procedural mishaps using different NiTi rotary systems in the hands of unexperienced pre-doctoral dental students; 2) to gain an understanding of which rotary file system students subjectively prefer. Methods: Second year dental students (n=94) enrolled in preclinical endodontics received instructional videos and didactic lectures on the use of three different rotary filing systems: Vortex Blue, EndoSequence, and ProTaper Universal. Students completed root canal treatment using each file system on 3D printed premolars. The quantitative evaluation was completed after each project by two calibrated examiners using …
A Computational Fluid Dynamics Analysis Comparing Irrigation Within Complex Root Canal Anatomy, Madeleinne Fern
A Computational Fluid Dynamics Analysis Comparing Irrigation Within Complex Root Canal Anatomy, Madeleinne Fern
Master's Theses (2009 -)
Objectives: The aim of this study was to compare fluid dynamics in complex root canal systems shaped with minimally invasive versus progressively tapered file systems using single and double side-vented irrigation tips at different flowrates. Methods: Two identical, plastic mandibular molars were instrumented with minimally invasive and progressive file systems and scanned via micro-computed tomography. A computational fluid dynamics model was generated and enhanced with accessory canals and isthmus in the distal and mesial roots, respectively. The model replicated irrigation within complex canal anatomy using both a single and double side-vented, 30-gauge irrigation tip at four flowrates: 0.05, 0.10, 0.15 …
Sleeveless Guides Are More Accurate Than Sleeved Guides: An In Vitro Study, Jenna Hang
Sleeveless Guides Are More Accurate Than Sleeved Guides: An In Vitro Study, Jenna Hang
Master's Theses (2009 -)
BACKGROUND: Esthetic and functional results of an implant and its final prosthesis depend largely on the accuracy of implant placement. Fully-guided surgeries have been proven to be more accurate than non-guided implant placement. Surgical guides with metal keys are often used during guided surgery, but add tolerance to the guides. Sleeveless guides may improve accuracy of implant placement. OBJECTIVE: This study aims to examine the difference between surgical guides with (S) and without sleeves (SL) in terms of trueness and precision. A secondary aim was to assess the impact of the distance of the guide to the implant platform. METHODS: …
Preemptive Analgesia And Pain After Periodontal And Implant- Related Procedures: A Systematic Review And Meta-Analysis, Christos Gousias
Preemptive Analgesia And Pain After Periodontal And Implant- Related Procedures: A Systematic Review And Meta-Analysis, Christos Gousias
Master's Theses (2009 -)
Objective: The purpose of this systematic review and meta-analysis is to document the effect of preemptive analgesia on patient-reported pain following periodontal and implant-related surgical procedures. Methods: A comprehensive search of the literature was conducted in PubMed, Cochrane, and Web of Science (PROSPERO ID: CRD42023471166). Randomized placebo-controlled clinical trials on adults undergoing periodontal and implant-related surgeries were included. A meta-analysis was performed comparing pain data at postoperative hours 1, 3, 6, 8, 24 and 72 between pre-emptive medication versus placebo groups. Results: Two independent reviewers screened 1,044 titles and included 15 studies (open flap debridement 6/12; flap and osseous surgery …
In Vitro Comparison Of Cellular Cytoxicity Of Conventional Vs. Cad/Cam Denture Base Materials, Zainab Hill Albasry
In Vitro Comparison Of Cellular Cytoxicity Of Conventional Vs. Cad/Cam Denture Base Materials, Zainab Hill Albasry
Master's Theses (2009 -)
Aim: Adverse reactions and local irritation of the oral mucosa to prostheses constructed from PMMA include allergic response, erythema, and a burning sensation of the tongue and mucosal tissues. Evidence on the cytotoxic effects of digitally manufactured denture base materials remains scarce. The aim of this study was to evaluate and compare the cytotoxic effects of CAD/CAM fabricated denture bases versus conventionally heat-cured acrylic resin materials. Materials and Methods: In total, 75 disks of five different denture resin materials – 15 disks per group were prepared: Ivocap (group 1; control), Ivotion denture base (group 2), Lucitone 3D denture base (group …
Effects Of Thermocycling And Hydrolytic Aging On The Flexural Strength Of Additively Manufactured Restorative Materials, Steven Mustafa Abu Al Tamn
Effects Of Thermocycling And Hydrolytic Aging On The Flexural Strength Of Additively Manufactured Restorative Materials, Steven Mustafa Abu Al Tamn
Master's Theses (2009 -)
Introduction: Additive manufacturing is being integrated into various aspects of clinical prosthodontics due to its potential for use in various indications and the promise of improved clinical efficiency and properties.Objective: The purpose of this in-vitro study was to evaluate the flexural strength of two 3D-printed resin composites in relation to a conventionally fabricated resin composite after being subjected to two different artificial aging methods: thermocycling and distilled water storage. Material and methods: A total of 220 samples were fabricated (N=220); 72 samples were fabricated from Integrity composite (Dentsply Sirona) and 148 samples were fabricated from two 3D-printed composite materials MFH …
Long-Term Assessment Of Skeletal And Dental Asymmetry After Conventional And Mini-Screw Assisted Rapid Palatal Expansion, Brett Barton
Long-Term Assessment Of Skeletal And Dental Asymmetry After Conventional And Mini-Screw Assisted Rapid Palatal Expansion, Brett Barton
Master's Theses (2009 -)
Objective: To evaluate the long-term skeletal and dental asymmetry following Mini-screw Assisted Rapid Palatal Expansion (MARPE), Rapid Palatal Expansion (RPE) and controls with 3D cone beam computed tomography (CBCT) analysis. Methods: 180 CBCT scans were evaluated retrospectively for 60 patients at pre-treatment (T1), post-expansion (T2), and post-treatment (T3). The patients were randomly assigned into 3 groups – MARPE, RPE, and controls. Anterior Nasal Spine (ANS), Posterior Nasal Spine (PNS), Zygomaticomaxillary Point (ZMA), Anterior Nasal Cavity Width (ANCW), Posterior Nasal Cavity Width (PNCW), External Maxillary Width (EMW), Palatal Width (PW), Maxillary Width (MMW), Maxillary Canine Width (MCW) were measured on the …
Factors Associated With Extraction Versus Non-Extraction Treatment Among Orthodontic Patients At Marquette University, Kelley Dentino
Factors Associated With Extraction Versus Non-Extraction Treatment Among Orthodontic Patients At Marquette University, Kelley Dentino
Master's Theses (2009 -)
Objective: This study aimed to use the available database (2017-2023) of the patients treated in the orthodontic graduate clinic at Marquette University School of Dentistry to survey epidemiologic characteristics and to determine the contributing diagnostic factors and their weights in decision-making for extraction vs. non-extraction treatment plans. Methods: Data were deidentified and extracted from the orthodontic module of the internal clinical records database in axiUm. We evaluated patients who presented between 2017-2023 for comprehensive treatment and collected the following parameters: age, race, gender, anteroposterior occlusal classification (Class I, II, III), skeletal vertical classification (high, normal, or low mandibular plane angle), …
Maxillary And Mandibular Incisor And Molar Dentoalveolar Heights In Untreated Subjects Presenting Class I And Class Ii Malocclusion, Samantha Zavada Cardinal
Maxillary And Mandibular Incisor And Molar Dentoalveolar Heights In Untreated Subjects Presenting Class I And Class Ii Malocclusion, Samantha Zavada Cardinal
Master's Theses (2009 -)
Objective : Class II malocclusion has been extensively studied, however there are many unanswered questions. This study analyzed the difference in incisor and molar dentoalveolar heights of untreated subjects presenting with Class I and Class II malocclusion. Dentialveolar heights are an aspect of the craniofacial complex that changes with growth and development and are manipulated by orthodontists. These changes hold important clinical implications for the development, maintenance and treatment of malocclusions. Methods : A sample of 96 untreated Class I and Class II subjects, with a total of 611 cephalograms was drawn from the archives of the University of Michigan …
Alveolar Bone Remodeling In Response To Orthodontic Tooth Movement, Matthew Raymond Mcgrady
Alveolar Bone Remodeling In Response To Orthodontic Tooth Movement, Matthew Raymond Mcgrady
Master's Theses (2009 -)
Objective: Dental protrusion and retrusion are common malocclusions in clinical orthodontics. When teeth are moved orthodontically, the alveolar bone surrounding the teeth remodels. In the past, incisor retraction-associated alveolar bone remodeling has been studied. However, less is known about the alveolar bone remodeling after incisors are proclined. This study aimed to assess the changes in alveolar bone thickness after proclination of maxillary incisors. The null hypothesis was that there is no difference in the surrounding alveolar bone thickness after orthodontic tooth movement. Materials and Methods: Patients were selected under the inclusion criteria of moderate-to-severe bimaxillary dental retrusion (U1-SN < 97°, L1-MP < 88.0°), absence of craniofacial anomalies, non-extraction, absence of missing teeth, with quality pre-and post-treatment lateral cephalometric images. Nineteen patients (10 males, 9 females; mean age 14.7 years) were selected, and their pre-treatment and post-treatment lateral cephalograms were digitally traced using a customized cephalometric analysis to compare changes in labial and lingual alveolar bone thickness (ABT) after orthodontic treatment. A two-sample t-test with R statistical software version 4.1.2 was used to measure the differences between the pre- and post-treatment cephalometric measurements. A p value less than 0.05 was considered statistically significant. Results: According to the SN-7° measurement method, ABT increased at the labial(b) SN-7 (0.27mm ± 0.70; p<0.05) and U1 labial(c) SN-7 (0.79mm ± 1.56; p<0.05) levels; however, ABT decreased at the U1 lingual (c) SN-7 (1.13mm ± 1.35; p<0.05) level. According to the perpendicular of the long axis of U1 root measurement method, ABT increased at the U1 labial(c) ⊥U1 (0.55mm ± 1.35; p<0.05) level while ABT decreased at the U1 lingual (b) ⊥U1 (0.79mm ± 1.03; p<0.05) and U1 lingual (c) ⊥U1 (1.61mm ±1.39; p<0.05) levels. Statistically significant changes were also found in post-treatment incisor angulation U1-SN° (8.05° ± 8.25; p<0.05), U1 – NA° (7.44° ± 8.08; p < 0.05) and post-treatment incisor position U1 – NA (mm) (1.64mm ± 2.63; p<0.05). Conclusion:The null hypothesis was rejected based on our results. There are statistically significant changes to the labial and lingual alveolar bone (ABT) after proclination of the maxillary incisors. Our data support previous findings in orthodontics literature. Further studies should be conducted that can employ larger sample sizes with imaging methods that overcome the limitations of conventional two-dimensional imaging.
Short And Long-Term Effects Of Conventional And Miniscrew-Assisted Rapid Palatal Expansion On Hard Tissues Using Voxel-Based Superimposition Of Serial Cbcts, Isaac R. Empson
Master's Theses (2009 -)
Objective: The objective of this study was to evaluate the short-term and long-term hard tissue changes with miniscrew-assisted rapid palatal expansion (MARPE) and rapid palatal expansion (RPE) compared to a matched control group with voxel based superimposition and three dimensional cone-beam computed tomography (CBCT) analysis. Methods:After IRB review, a total of 180 cone beam computed tomography (CBCT) scans were analyzed for 60 patients with a mean age of 13.9 years at 3 time points: pretreatment (T1), Post-Expansion (T2), and Post-treatment (T3). Patients were divided into 3 groups: MARPE, RPE, and controls. Voxel-based superimposition was performed for CBCTs from T1 to …
The Influence Of The Digitization Method On The Assessment Of Accuracy And Reliability Of Implant Placements, Ajitesh Singh
The Influence Of The Digitization Method On The Assessment Of Accuracy And Reliability Of Implant Placements, Ajitesh Singh
Master's Theses (2009 -)
Purpose: Studies investigating the accuracy of implant placement are utilizing different methods to digitize the post-operative implant position to compare it with the planned reference position. This study aimed to compare the influence on radiographic and digital methods in the accuracy of static computer-assisted and free hand implant placement.Methods: In total, n=40 implants were placed either fully guided (n=20) or free-handed (n=20) in standardized mandible replicas. A static surgical guide was planned for the fully guided surgery group (FG) for an implant at the lower right first molar site and 3D printed. In the free-hand group (FH) the implant surgery …
The Effect Of Endodontic Access Cavity Designs On Crack Propagation Of Mandibular Molars, Colin Kodama
The Effect Of Endodontic Access Cavity Designs On Crack Propagation Of Mandibular Molars, Colin Kodama
Master's Theses (2009 -)
Introduction: This study aimed to develop a 3-D finite elemental analysis (FEA) model and digitally incorporate a crack into this model. After model development, this study compared the load required to propagate this crack in a mandibular molar with 3 different endodontic cavity designs using FEA. Methods: 3-D printed mandibular first molars (Endo 3DP; Acadental, Lenexa, KS) were accessed with 3 different access cavities: a traditional access cavity (TRC), a ninja access cavity (NAC), and a truss access cavity (TUC). The teeth were instrumented to EndoSequence #35/.04 in the MB and ML canals and #40/.04 in the D canal. Each …